ok, do what I am telling u!!!
execute the firewall.
install kaspersky antiviruse version6
and do a complete scan to ur computer, i am sure that all viruses will be gone, cus if u have a good computer, the freezing = viruses.
I based my response off the results of tests that myself and a few other friends of mine performed. We install several of the AV's on VM and then ran them to see what the results were before and after.
Norton was the worst AV (Both current and the new 07 Beta) followed by Kaspersky. Avast and NOD32 were at the top.